Ok well, you might need to contact Crytek support for help with that. I suspect that the version of the sandbox you’re using was compiled a slightly older version of FMOD. These sorts of errors usually arise due to changes in the FEV file format.

[quote:114bl0o5]then the project folder have a .fdp, .h , .fev, .txt, .fsb files[/quote:114bl0o5]
You only need the .fev and .fsb files to use FMOD Sandbox. You don’t need to move any files, Sandbox can work with files that are anywhere.